摘要： In this study, we have investigated the oxygen reduction reaction (ORR) activity and durability of Co-based catalysts mechanistically. CoPt/C catalysts with a Pt loading of 7 wt% and Au modification have been prepared and shown excellent ORR performance. The various as-prepared CoPt/C and CoPtAu/C catalysts have about 2.6-9.2 times higher mass activity than commercial Pt/C. The mechanistic insight obtained by density functional theory calculations has shown that the enhanced activity is attributable to the fact that Co-based catalysts can easily dissociate surface O 2 * without the high-barrier protonation step and efficiently remove the dissociated O*. The improved stability, 1000 th decay = 14.6%, corresponds to the fact that the core Au can resist the shrinkage of surface Pt during the accelerated durability test. Au in the inner core of CoPt/C can effectively stabilize its structure during the stability test of the oxygen reduction reaction. 出版日期： 2016-01-01 出處： Journal of materials chemistry. A, Materials for energy and sustainability, 2016-01, Vol.4 (28), p.1123-1129 資源來源： Royal Society of Chemistry 識別號： ISSN: 2050-7488 識別號： ISSN: 2050-7496 識別號： EISSN: 2050-7496 識別號： DOI: 10.1039/c6ta04154j
